Milk frother



FIG. 1 is a top, rear and left side perspective view of a milk frother showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a the top, front and right perspective view of the milk frother in an open position;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in the drawings are included for the purpose of illustration and form no part of the claimed design. 

The ornamental design for a milk frother, as shown and described. 